Audio Dynamics T-200 AM/FM Tuner (c. 1988)
Documentation on the Audio Dynamics T-200 is thin. The record is almost entirely one proper lab test and a brief product note. It was an AM/FM tuner, reviewed by Julian Hirsch at Hirsch-Houck Laboratories in HiFi/Stereo Review (April 1988, p.53).
The notable feature was an AUTO IF circuit. Control circuitry sensed interference or insufficient signal strength and switched the tuner to a narrow IF band for greater selectivity. The circuit could also be disengaged. Hirsch found sensitivity very good in both modes. He noted that capture ratio and selectivity could not be measured with the wide IF band, because the tuner circuits kept switching to narrow. The FM antenna input was a 75-ohm F-type coaxial connector, with a 300-to-75-ohm transformer furnished for 300-ohm antennas. AM used screw terminals. A separate short item in Audio (November 1988, p.30) added that capture ratio held at 1.5 dB for signal strengths from 25 to 65 dBf, with separation of 30 dB.
Almost nothing else is recorded beyond those two period mentions. There is no original price, no production years, no manufacturer background and no owner lore. If you have a T-200 or its manual, the archive would like to hear from you.
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